housing problems after job loss Korea address change Korea billing error foreigners Korea healthcare Korea job loss mistakes Korea foreigner NHIS Korea foreign residents mobile banking Korea expat tax risk Korea HiKorea address report foreign resident Korea address registration foreigner Korea bank account Korea foreigner ARC address change foreign resident bills korea overpay insurance utilities korea fix billing moving in Korea dependent insurance Korea foreign resident fine korea ARC bank account Korea address registration risk Korea local office notices foreigners Korea health insurance bill Korea local office foreigners Korea Korean bank account health insurance foreigners korea national health insurance korea foreigners insurance after unemployment Korea address reporting korea foreigner foreign resident bills Korea foreign resident tax Korea living in Korea